Improvement in steam-engines



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Letters Patent N 106,497, 'dated August 16, 1870 IMPROVEMENT 1N STEAM-ENGINES.

The Schedule referred to :lu these Letters Patent and making part of the same.

To all whom it may concern Beit known that I, HERMANN Mona, of the city,

county, and State of N ew York, have invented cersteam ofi' at once, often leaving insuiiicient surplus power for heavy work, either temporary or at short intervals, I have sought to overcome these diiculties by a novel construction and arrangement of I ncchanical devices, especially applicable vtoand designed as an improvement onthe Gorliss steam-engine, for working steam expansively, andl others that may be of a similar construction.

In the drawings- Figure I is a front elevation ofv my improved engine.

Figure II is a planof the same.

A is a vertical rod, moving by means of a segment or a lever, with the box of the governor np and down, but inta reversed direction, when thc former moves-np the latter moves down, &c.

C and D are two liberating devices or. pieces,

which'turn round pins B, fastened on the rod A, and are connected with an eccentric, E, by lmeans of several little rods L, M, and N,'and` the levers H vand I.

These pieces G and D are working upon the valvecatches F and G.

The levers H and I are connected by the rod K in such a manner that the points b and c have an equal motion, but reciprocal.

Lever H llas its fulcrnm at a, and lever I at i.

These pieces C and D are moved by an eccentric, E, which is fastened to the main shaft, and their motion Ais conformable to that of the piston in the cylinder.

The motion of the points c and d of the'pieces C and D round thc pins B must he equal in length to the whole motion of the rod A.

Snpposing the rod Acan be moved np or down two incheshthen the eccentric E must move the points c or al also two inches.

When the rod A is in its highest position, the

. pieces (l and D will throw the valve-catches out at the end of the piston-stroke, and when the rod A is in its lowest position, the points c and d do not come higher than the inclines f and g of the valvew catches, in order to throw them out, and to permit the val-ve to return just before the valves would open the steam-ports. I

As to the valvecatches themselves, they' must have-a'certain shape, vsuitable for the pieces C and D to work upon them inthe correct manner. The position ofthe smalll inclinesf and g is ot' the greatest importance.

They must be adjustedso that, with the rod A in its lowest position, the point-s c and d will just strike them. and throw the valve-catches out of actio'uat the proper time after `the valves begins to open the steam-ports. i

The distances of h on the catches must be atv least three-fourths ofthewhole stroke of the rod A,

to give the catches snicieut time to catch the valvestems.

'To compensate for the slight irregularities which are produced bythe circular motions, the horizontal top k of the catches must be slightly curbcd.

All other parts'of the Corliss steam-engine are not aiected by the application of my improvement.

It will thus be seen that, by means of my improvement,-several important advantages are secured.Y

The engine can be set in motion without any uuusual care or attention on the part ofthe engineer.

The expansion, when starting the engine, increases gradually, and may be changed, as desired, by the action .of the governor. V

As'this expansion may be increased or changed,

the engine becomes more economical and convenient for establishments in which temporary surplus power is required. Y

g Them for-instance, two of these vimproved origines are working coupled, should one of them at any time becomev untit for service, the other can be made todo the entire work,.which, under ordinary expansion,.was performed by both.

It will be further noticed that the governor of my improved engine, in connection with the mechanism for regulating the expansion, works with a variable speed, accordingto the variable speed of the pistou, so that, by a certain change of the position ofthe governor, the steam-admission period is' shortened or lengthened a. given amount, irrespective of the degree of expansion under which the engine may be worked, and in this way it will be seen that the expansion is changed with the speed ofthe piston.

It is obvious that other mechanical devices may be constructed and arranged for combining the lnotion of the'piston and the governor, so as to change the degree ot' expansion, and hence I do not confine myself to any specific construction and arrangement of devices but Having thns described my invention, What I do claim is 1. `As an improvement `in the Corliss engine, for working steam expnnsivel'y, the liberating devices O and D, when constructed and arranged to be actuated,

by the speed of the piston and the position of the governor, substantially as herein described and for the purpose s'et'forth. I'

2. In combination with the piston, main-shaft, and

governor, the rod A', devices C D, rods L, M, N, and K, and eccentric E, when constructed and arranged to opera-te substantially as and for the purpose set forth.

HERMANN MOHR.

Witnesses:

OHAS. A. SCHOTT, E. F. SOMMER. v 

